A investigator wants to assess the effects of three interchangeable shelves (called A, B, c). The investigator plans to complete the estimate by the sales situation caused by each change in each store through observing the three time periods. Which experiment will this investigator use?
The respondent should make a form in each time period, each different change in each store, to make a form to make a form for statistics, the form is designed as follows: (where x, y, z represents different stores, "said a certain Sales of time schedule A)
Arrange A Arrange B Arrangement C Total
X Y Z Hezi X Y X Y Z
Time segment 1
Time segment 2
Time section 3
